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vesna_86 [32]
3 years ago
9

During two years, the population of birds of an island became 7 times more than before. If the first year increase in the popula

tion was 40% , what was the percent increase of the second year?
Mathematics
1 answer:
nordsb [41]3 years ago
6 0

Answer:

The percent increase of the second year is 400%.

Step-by-step explanation:

Consider the provided information.

Let the population of birds was x.

After 2 years the population becomes 7 times more than before.

Therefore, after 2 years population is 7x.

In first year increase in the population was 40%.

Population after 1st year = x + 40% of x

Population after 1st year = x + 0.40x

Population after 1st year = 1.4x

The population increase from 1st year to 2nd year is: 7x-1.4x=5.6x

Thus the percentage increase is:

\% increase=\frac{5.6x}{1.4x}\times100=400\%

Hence, in second year the population of birds increase by 400%.

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Answer:

2.a)11.355 b)0.94625

3. divide 6 by 4

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Step-by-step explanation:

To convert one measurement to another you need to set it up so that the old measurement gets cancelled out when you multiply the conversion ratio.

2a)  \frac{3 gallons}{1} *\frac{3.785 milliliters}{1 gallon}=11.355 milliliters the gallons on top and bottom get cancelled out leaving you with the measurement that you want

2b) \frac{1quart}{1} *\frac{1 gallon}{4 quarts} *\frac{3.785 milliliters}{1 gallon} = 0.94625 milliliters

3) \frac{x}{y} \frac{6 quarts}{1} *\frac{1 gallon}{4 quarts} = 1.5 gallons

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7 0
3 years ago
Fiona starts at the beginning of a hiking trail and walks 4/5 mile. She counts the mileage markers that are placed every 1/10 mi
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She counts 8 markers because 4/5 equals 8/10 and she counts the mile markers every 1/10 of a mile.
3 0
3 years ago
Using the relation in Part B, what is the value of x if f(x) = 99?
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I hope this answer helps 

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3 years ago
Sophie is buying a gold chain. The gold chain costs $2.50 per centimetre. How many centimetres can she buy if she has $30 to spe
goldenfox [79]

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12 centimeters

Step-by-step explanation:

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The width of a rectangle is (x-5) and the length is (x+2). What is the length and width of the rectangle if the area is 18 squar
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Answer:

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Width: 2

Step-by-step explanation:

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2 years ago
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